Firefighters say higher humidity and lower temperatures have helped them nearly contain a wildfire smoldering in the high desert north of Los Angeles.

The fire has charred nearly 22 square miles of brush in the Antelope Valley. It was 87% contained Sunday and crews hope to have it fully surrounded by Monday evening.

Los Angeles County Inspector Don Kunitomi says all roads in the area were reopened at sunrise Sunday.

Investigators say the fire, which broke out Thursday, may have been sparked by someone working on a car wheel.

Four homes and five outbuildings were destroyed.

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